#include<iostream>
#include<vector>

using namespace std;

int main()
{
    vector <vector<int>> p={{1,2},{3,4},{5,6},{7,8,9}};
    for(auto i:p)
    {
        for(auto j:i)
        {
            cout<<j<<" " ;
        }
        cout<<endl;
    }
}
